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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2016-06-14 00:26:13 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-06-13 21:43:04 -0600 |
| commit | 700ca8c04a0f4402f379055eec97351e0d6c0087 (patch) | |
| tree | c69ed1d2afe9c805a018e04baec8694043b9882b /drivers/block/drbd/drbd_protocol.h | |
| parent | c5c2385481971a587b4f036d640cc585d75601a0 (diff) | |
| download | linux-700ca8c04a0f4402f379055eec97351e0d6c0087.tar.gz linux-700ca8c04a0f4402f379055eec97351e0d6c0087.tar.bz2 linux-700ca8c04a0f4402f379055eec97351e0d6c0087.zip | |
drbd: Implement handling of thinly provisioned storage on resync target nodes
If during resync we read only zeroes for a range of sectors assume
that these secotors can be discarded on the sync target node.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/drbd/drbd_protocol.h')
| -rw-r--r-- | drivers/block/drbd/drbd_protocol.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_protocol.h b/drivers/block/drbd/drbd_protocol.h index 129f8c76c9b1..ce0e72ca47ec 100644 --- a/drivers/block/drbd/drbd_protocol.h +++ b/drivers/block/drbd/drbd_protocol.h @@ -60,6 +60,10 @@ enum drbd_packet { * which is why I chose TRIM here, to disambiguate. */ P_TRIM = 0x31, + /* Only use these two if both support FF_THIN_RESYNC */ + P_RS_THIN_REQ = 0x32, /* Request a block for resync or reply P_RS_DEALLOCATED */ + P_RS_DEALLOCATED = 0x33, /* Contains only zeros on sync source node */ + P_MAY_IGNORE = 0x100, /* Flag to test if (cmd > P_MAY_IGNORE) ... */ P_MAX_OPT_CMD = 0x101, |